摘要
LTE作为新一代的移动通信系统,具有带宽大、覆盖能力强、频谱效率高等特点,能够更好地满足逐渐增长的多媒体业务需求,但是无线资源的局限性仍然存在,用户业务的多样性、高铁环境的特殊性加大了对频谱资源最大化合理利用研究的挑战。本文针对高速铁路的特点,在对经典的LTE资源调度算法分析的基础上,提出基于提高列车用户公平性的p-PF算法,并对改进后的算法进行仿真分析。仿真结果表明,在不同的列车速度、用户数和业务类型下,该算法既保证了列车用户吞吐量也有效提高了列车用户的公平性,能够更好的适应高速环境。
LTE as a new generation of mobile communication system characterized by large bandwidth, high coverage capacity and high spectrum efficiency, can better meet the growing demand of multimedia service. However, given the limit of wireless resource, the diversity of user services and the particularity of high speed rail environment have increased the challenge of the research on the maximization of the rational utilization of spectrum resource. In response to the characteristics of high speed railway, based on the analysis of the classical LTE resource scheduling algorithm, a packet scheduling algorithm p-PF which aims to improve the fairness of train users was proposed and a performance simulation on the improved algorithm was made in this paper. The simulation results showed that, under different train speeds, number of users and service types,the p-PF algo- rithm can better adapt to high-speed railway environment by not only ensuring the throughput of the train us- ers, but also effectively improving the fairness of them.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2016年第9期81-85,共5页
Journal of the China Railway Society
